The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 415
rom 3J feet in length,2J feet in breadth and 3 feet in depth to 6J x 5 x 6 respec-tively. Fig. 385 gives a sectional elevation of one of thesmallest size under a footway, and shows the general method ofconstruction, Fig. 386 being a plan of the same. The water-proof brickwork (Staffordshire Brindle… … Fig. 384.— ValentineConduits Wood-Block UNDERGROUND WORK 387 being embedded in concrete.* The brickwork is 9 inches wmjj^^^
Telephone
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
